The content of major- and trace elements in wild-growing mushrooms has been subject to numerous studies, but the data on long-term trends in this regard are scarce. The aim of research was to determine the content of 34 elements in four edible mushroom species Boletus edulis, Imleria badia, Leccinum scabrum and Macrolepiota procera, and associated soil collected from Polish forests between 1974 and 2019. As initially hypothesized, the element concentration in the studied soil revealed an increasing trend and was positively correlated with their levels found in fruit bodies. Bioconcentrafion Factor values exceeding 1 were documented for all mushroom species for K, P, Ag, Cd, Cu, Hg, and Zn. When compared to the Adequate Intakes, all the mushroom species were found to be a good dietary source of K, P, and Zn (range of 6260-8690, 6260-8690 and 97-135 mg kg-1 dry weight (dw), respectively), and B. edulis and I. badia a moderate source of Fe (mean 71.5 and 76.5 mg kg-1 dw, respectively), B. edulis of Mn and Mo (mean 20.0 and 0.42 mg kg-1 dw, respectively), while L. scabrum and M. procera a source of Cu. Consumption of the studied mushrooms would not lead to significant exposure to Al, As, Cr, or Ni. Considering that wild mushrooms will continue to be collected in Poland, one should bear in mind that they are a limited source of minerals in the human diet while their frequent, regular consumption, associated with exposure to selected toxic elements, should not be recommended.

Adam Mickiewicz University Faculty of Biology Department of Water Protection Uniwersytetu Poznańskiego 6 61 614 Poznań Poland

Adam Mickiewicz University in Poznań Faculty of Chemistry Uniwersytetu Poznańskiego 8 61 614 Poznań Poland

Integrated Science Association Rokietnicka 8 60 806 Poznań Poland

Poznań University of Life Sciences Department of Chemistry Wojska Polskiego 75 60 625 Poznań Poland

Poznań University of Life Sciences Department of Ecology and Environmental Protection Piątkowska 94c 60 649 Poznań Poland

Poznań University of Life Sciences Department of Mathematical and Statistical Methods Wojska Polskiego 28 60 637 Poznań Poland

Poznań University of Life Sciences Department of Vegetable Crops Dąbrowskiego 159 60 594 Poznań Poland

Poznań University of Medical Sciences Department of Environmental Medicine Rokietnicka 8 60 806 Poznań Poland

University of Rzeszów Department of Soil Science Environmental Chemistry and Hydrology Zelwerowicza 8b 35 601 Rzeszów Poland

University of South Bohemia Faculty of Agriculture Department of Applied Chemistry 370 04 České Budějovice Czechia Republic

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